Apply: Food chains show how matter is transferred between biotic factors in an ecosystem. But matter is also transferred between biotic
and abiotic factors.
Which of the following are examples of the transfer of matter
between biotic and abiotic factors?

A penguin eating a fish

A seal heating up a rock

Seaweed absorbing carbon dioxide from sea water

A dolphin breathing out carbon dioxide

The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i.e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).

What is the difference between a scientific hypotheses and a scientific theory?

One reason scientists are trying to develop fuel sources from corn and sugar is because these sources are renewable fossil fuels are being depleted these crops can be widely grown all of the above